The W3C XML Query WG has released version 0.7 of the XQuery Update 
Facility Test Suite, which you can obtain from here:

http://dev.w3.org/cvsweb/2007/xquery-update-10-test-suite/Overview.html?rev=1.7

This test suite corresponds to the XQuery Update Facility:

XQuery Update Facility 1.0
http://www.w3.org/TR/2007/WD-xquery-update-10-20070828/

The XQuery Update Facility Test Suite was designed to test whether the 
W3C XQuery Update Facility can be implemented interoperably as 
published. If you have implemented the XQuery Update Facility, using 
this test suite facility is a good way to ensure that your 
implementation follows the specification, and to identify aspects of the 
specification that should be changed if there are implementability 
issues. Sending us your test suite results helps the XML Query Working 
Group to satisfy the requirements to progress toward W3C Candidate 
Recommendation status.

The XQuery Update Facility adds 4 new updating expressions to XQuery 
1.0; insert, replace, rename, and delete. These expressions modify 
instances of the XQuery 1.0 and XPath 2.0 Data Model (XDM). The XQuery 
Update Facility also adds a non-updating expression, transform, which 
returns an XDM instance that has been created by copying existing XDM 
instances and then modifying them.

Jonathan